Brush-holder.



No. 629,823. Patented Aug. I, I899. s. H. SHORT.

BRUSH HOLDER.

(Application filed Aug. 26, 1898.) (No Model.)

- f Q ff M UNITED STATES PATENT OFFICE SIDNEY ll. SHORT, OF CLEVELAND, OHIO, ASSIGNOR-TO TIlE VALKER COMPANY, OF NE? JERSEY.

BRUSH-HOLDER.

SPECIFICATION forming part of Letters Patent No. 629,823, dated August 1, 1899.

pplication filed Augus 26,1898. $eria1No. 689,566. (No model.) I I To (LZZ whom, i2; may concern:

.Be it known that I, SIDNEY H. SHORT, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Brush- I'lolder, of which the following is a specification.

This invention relates to an improvement in brush-holders.

The object of the invention is to improve the adjustment of such holders.

The invention consists, substantially,in the construction hereinafter described, and more particularly pointed out in the claims.

Like letters and numerals refer to similar parts in the several views of the drawings, in which Figure 1 is a side elevation of the complete brush-holder device as it is applied to a commutator. Fig. 2 is a vertical central section on the line a a, Fig. 1. Fig. 3 is a vertical section on the line 50 x, and Fig. 4 is a top or plan view of an adjusting-plate.

The brush-holder shown in the accom panying drawings and hereinafter described is particularly designed for use with street-railway motors, although it is capable of a more general application, includi u use on stationary motors.

One purpose of the construction is to provide an adjustment lengthwise with the com mutator for the whole brush-holder device, so as to center the brush upon the Wearing-surface of the comm utator-bar or to place it midway between the commutator-lug and the outer end of the commutator-bar. Considerable trouble has been experienced in practice because of difliculty in adjusting the brushholders lengthwise with the commutator, in that the brush often overhung the end of the commutator and sometimes came so close to the lug of the latter as to cause the brushholder to strikeagainst such lug.

Another feature of the invention provides an adjustment for the individual brush-holders radially with the commutator, so that as the commutator-surface wears down the brush-holder can. be adjusted to follow the wear of the commutator and prevent too much space beingleft between the brush-holder and the commutator face or surface.

Any desired number of individual brushholders are mounted upon the brush-holder ing-bracket is in turn suspended from the upper part 0 of such bracket, which latter in its turn is hungfrom frame-casting F of the motor-shell or machine, to which it is attached by means of cap-screws 1. The under side of the upper part C of the adj listing-bracket is serrated or notched to fit the serrations, or notches in the surface of the lower part of such bracket, and these two parts are clamped together detachablyas, for instance, by means of cap-screws 2,the lower ends of which screw into the lower part and pass through. elongated slots t, formed transversely of this upper plate or part O--that is, formed in the direction of the length of the commutatorbarsand while the construction affording this adjustment, as shown and just described,

is found convenient and well adapted for the purpose, it is obvious that the details of such construction maybe widely varied without departing from the invention, so long as the principle of adjustment is effected by the mechanism employed. As before explained, the object of this adjustment lengthwise of the commutator is to permit the whole brushholder device containing all the individual brush-holders to be placed midway between the commutator-lug and the outer end of the commutator-bar.

In addition to the adjustment of the whole brush-holder device in the manner just described there is also provided a separate adjustment for the individual brush-holders in a radial direction with respect to the commutator, so that as the commutator-surface wears down each individual brush-holder can be ad-,

j usted to follow the wear of the commutator. In order to provide this adjustment the construction which will now be described has been found very convenient in practice. The bar A has secured to it a brush-holder plate E or as many of them as there are brushholders. The plate E is provided with a socket or other means of attachment for the conducting-cable which is to carry the current to and from the brush-holders, said conductingcable being designated in the drawings by the letter G. lVood-screws XV may be employed to fasten the plate E to the bar A, or they may be secured to the same in any convenient manner. The socket or holder for the brush is designated by the letter D and is provided with a projecting arm, (lettered Y,) which is serrated on one face. The plate E is also serrated upon its outer face, and these two serrated parts are held in engagement in any suitable manner-as, for instance, by bolts i-the slots in the projecting part Y to permit the passage of the bolts being elongated, as shown in the drawings, for the purpose of permitting adjustment when the bolts are loosened. This adjustment, as will be seen, is radially of the commutator and is for the purpose before described. \Vhile the scrrated plates and clamping-bolts have been found well adapted for the purpose in practice, and therefore preferable, yet it is obvious that other means maybe utilized for accomplishing this adjustment.

Vhat I claim, and desire to secure by Letters Patent, is-

1. In a brush-holder for electric machines, a supporting-bar arranged in a plane transversely intersecting the commutator, a series of individual brush-holders mounted thereon, each adapted to receive a brush, said brushes being radially arranged with respect to the axis of the commutator, and means for adj usting said supporting-bar longitudinally of the commutator, as and for the purpose set forth.

2. The combination with the frame of the motor, of a supporting-bar mounted thereon, said supporting-bar being arranged in a plane transverselyintersecting the comm utator,and adjustable upon said frame longitudinally of the commutator, a series of individual brush-holders mounted upon said bar, each adapted to receive brushes, said brushes being arranged radially with respect to the axis of the commutator, as and for the purpose set forth.

3. A brush-holder device, comprising a bar adapted to carry aseries of brush-holders, the frame of the motor shell or machine, a bracket suspended from such frame and connected to the bar and comprising two parts adjustable with relation to each other; substantially as and for the purpose set forth.

4:. A brush-holder device, comprising the frame of the motor shell or machine, a brushholder bar adapted to carry the individual brush-holders, a bracket intermediate of the frame and bar suspended from the former and supporting the latter and composed of two parts having serrated engaging faces,and means for tightly holding the two parts of the bracket together or loosening the clamping action so as to permit the adjustment of such two parts; substantially as and for the purpose set forth.

5. A brush-holder device, comprising the frame of the motor shell or machine,a bracket composed of two parts, the upper one of which is bolted to such frame and has its under surface serrated, and the lower memberof which is bolted to the brush-holder bar and has its upper surface serrated, bolts for clamping the two members of the bracket together for permitting them to be adjusted laterally, and a bar secured to the lower part of such bracket and carrying the individual brush-holders; substantially as and for the purpose set forth.

6. The combination with the frame of the motor, of a supporting-bar mounted thereon, and arranged in a plane transversely intersecting the commutator, means for adjusting said bar upon said frame longitudinally of the commutator, a series of individual brushholders mounted on said supporting-bar, said holders being adjustable radially of the commutator and adapted to receive brushes therc in, as and for the purpose set forth.

'7. A brush-holder, comprising a supporting part having a plate with a serrated surface and a holder part having a projecting plate with a similarly-serrated surface, and means for clamping such parts together for permitting them to be loosened or adjusted with relation to each other; substantially as and for thepurpose set forth.

8. Abrush-holder, comprisinga supporting part having a socket for the conducting-cable and a serrated face and a holder part for containing the brush and also having a serrated face, and a bolt for securing these serrated faces in proper adjustment as desired; substantially as and for the purpose set forth.

9. The combination with the frame of the motor, of a supporting-bar of insulating material mounted thereon means for adjusting the same lengthwise of the commutator, a series of individual brush-holders independently supported upon said bar, and means for radially adjusting the same with respect to the axis of the commutator, said holders adapted to receive the brushes, as and for the purpose set forth.

In witness whereof I have hereunto set my hand, this 22d day of August, 1898, in the presence of the subscribing witnesses.

SIDNEY ll. SHORT. lVitnesses:

M. A. Knnsmcnn, .Tonu J. Bevan. 

